/* twoway.h */
/*
 *     wayin - escape probability in inward direction
 *     wayout - escape probability in outward direction
 *     =1 when outward optical depths unknown (touton .false.)
 *     fractin = wayin / (wayin+wayout) when outer defined, else zero
 */
EXTERN struct t_twoway {
	float wayin, 
	  wayout, 
	  fracin;
	}	twoway;